Download or read book Clock synchronization in distributed systems a comparison written by Harald Bachner and published by GRIN Verlag. This book was released on 2007-03-01 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bachelor Thesis from the year 2007 in the subject Computer Science - Technical Computer Science, grade: 1,0, University of Applied Sciences Technikum Vienna (Informations- und Kommunikationssysteme), language: English, abstract: Clock synchronization is a necessary and critical part in most distributed systems. For many years NTP was the state-of-the-art way of synchronizing computer clocks distributed in space. However, as recent advances in miniaturization lead to the construction of smaller, more powerful and less power consuming computers, embedded devices, sensors and actuators, the need for more precise time synchronization grew. This work thus sets out to compare selected approaches to clock synchronization in distributed systems. The well known Global Positioning System is disseminating accurate time and frequency information from the International Institutes that keep the time, NTP can still do the same, but at different levels of accuracy as well as cost. Clock synchronization protocols like IEEE1588 or TTP and bus architectures like FlexRay evolved from the need to further propagate the timing information within small networks and therefore staying within the specified limits of preciseness.
Download or read book Clock Synchronization in Distributed Systems a Comparison written by Harald Bachner and published by GRIN Verlag. This book was released on 2007-07-26 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bachelor Thesis from the year 2007 in the subject Computer Science - Technical Computer Science, grade: 1,0, University of Applied Sciences Technikum Vienna (Informations- und Kommunikationssysteme), 29 entries in the bibliography, language: English, abstract: Clock synchronization is a necessary and critical part in most distributed systems. For many years NTP was the state-of-the-art way of synchronizing computer clocks distributed in space. However, as recent advances in miniaturization lead to the construction of smaller, more powerful and less power consuming computers, embedded devices, sensors and actuators, the need for more precise time synchronization grew. This work thus sets out to compare selected approaches to clock synchronization in distributed systems. The well known Global Positioning System is disseminating accurate time and frequency information from the International Institutes that keep the time, NTP can still do the same, but at different levels of accuracy as well as cost. Clock synchronization protocols like IEEE1588 or TTP and bus architectures like FlexRay evolved from the need to further propagate the timing information within small networks and therefore staying within the specified limits of preciseness.
Download or read book Global States and Time in Distributed Systems written by T. Anthony Marsland and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 1994 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected papers on global states and time in distributed systems. Among the topics: synchronizing clocks in the presence of faults, Internet time synchronization, and virtual time and global state in distributed systems. Includes an annotated bibliography of principal associated works. No index. Ann
Download or read book Advances in Computing and Information Technology written by Natarajan Meghanathan and published by Springer Science & Business Media. This book was released on 2012-06-30 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: The international conference on Advances in Computing and Information technology (ACITY 2012) provides an excellent international forum for both academics and professionals for sharing knowledge and results in theory, methodology and applications of Computer Science and Information Technology. The Second International Conference on Advances in Computing and Information technology (ACITY 2012), held in Chennai, India, during July 13-15, 2012, covered a number of topics in all major fields of Computer Science and Information Technology including: networking and communications, network security and applications, web and internet computing, ubiquitous computing, algorithms, bioinformatics, digital image processing and pattern recognition, artificial intelligence, soft computing and applications. Upon a strength review process, a number of high-quality, presenting not only innovative ideas but also a founded evaluation and a strong argumentation of the same, were selected and collected in the present proceedings, that is composed of three different volumes.
Download or read book Time Synchronization in Distributed Systems Without a Central Clock written by Takin Tadayon and published by . This book was released on 2019 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time synchronization and a common understanding of the concept of time is an essential and important aspect of modern computing. Among the drawbacks of current and popular methods, such as the Network Time Protocol, (NTP), or the Precision Time Protocol, (PTP), are the need for live synchronization, and the use of a central reference clock. While these methods are ideal in an environment with constant, uninterruptible, and reliable internet connection, they may prove impracticable in a number of scenarios including Internet of Things (IoT) devices. In cases where there is no access to a central clock, or where the accuracy of two clocks is paramount yet there exists no reliable network access, new methods for synchronization are needed. Our proposed method utilizes existing hardware, without the need for onerous algorithms, in order to establish time-accuracy between two devices. The method effectively establishes a master-slave relationship between two computers, and endeavors to find the difference in time between the two devices, over a period of time. This reduces the reliance on constant, and on-going connection to a central clock. Further, in cases where methods such as NTP, or PTP may be preferred, our proposed solution can bolster those protocols.
Download or read book A Model based Approach to Clock Synchronization in Distributed Systems written by Joydeep Ganguly and published by . This book was released on 2000 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Simulation of Clock Synchronization in Distributed Systems written by Anton V. Schedl and published by . This book was released on 1996 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book DISTRIBUTED OPERATING SYSTEMS written by PRADEEP K. SINHA and published by PHI Learning Pvt. Ltd.. This book was released on 1998-01-01 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: The highly praised book in communications networking from IEEE Press, now available in the Eastern Economy Edition.This is a non-mathematical introduction to Distributed Operating Systems explaining the fundamental concepts and design principles of this emerging technology. As a textbook for students and as a self-study text for systems managers and software engineers, this book provides a concise and an informal introduction to the subject.
Download or read book Clock Synchronization in Distributed Systems written by Martin Horauer and published by Sudwestdeutscher Verlag Fur. This book was released on 2009 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: A system-wide global time base with known precision is frequently of pivotal importance for the design and operation of distributed systems and services. The requirements and the large scale often demand a high-precision below the microsecond-range. The IEEE-1588 standard addresses these issues and proposes ways for a suitable implementation. Complementing these solutions, an alternative architecture for network interfaces and networked devices is proposed that renders a worst-case precision in the 100 ns-range possible. Furthermore, an analysis and an experimental evaluation reveals actual values for the worst-case precision that might be achieved.
Download or read book Clock Synchronization and Comparison written by James E. Gray and published by . This book was released on 1976 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Times estimates and clock synchronization in distributed systems written by Cheeha Kim and published by . This book was released on 1989 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "This paper presents a simple and efficient solution to the problem of estimating the correct time in distributed systems. Based on a clock model consisting of an offset and a rate, the estimating process is constructed. Various simulation results show that the method enables to achieve clock synchronization precision superior to those obtained by previously published clock synchronization algorithms."
Download or read book Fault tolerant Clock Synchronization in Distributed Systems with Low Topological Requirements written by Zoha Moztarzadeh and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Building High performance Distributed Systems with Synchronized Clocks written by Feiran Wang and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Synchronized clocks can be used to improve the performance of distributed algorithms. They put the computers in a distributed system onto a single timeline, allowing the events that happen in the system to be ordered in a consistent way. This dissertation presents two work related to synchronized clocks. The first work is the CRaft consensus protocol. Consensus protocols allow a collection of machines to work reliably in the presence of failures. Today's most widely used consensus protocols, such as Paxos and Raft, usually require a single leader server during normal operation. All client requests go to the leader. This limits the throughput and scalability of such protocols. CRaft is a scalable multi-leader extension to Raft. It runs multiple Raft groups, and uses precisely synchronized clocks to combine the logs from Raft groups. By distributing the load to multiple servers, CRaft achieves higher throughput compared to Raft, while providing the same consistency guarantees as Raft. The second work is the Self-Programming Network dashboard. During the past decade, the networks have evolved to provide more complex functions, such as supporting data-intensive or computation-intensive tasks. The Self-Programming Network dashboard aims to provide network operators and application users a transparent and interactive view into the network, facilitating the analysis and diagnosis of network performance problems. The dashboard visualizes detailed network states, where synchronized clocks are used to process the data.
Download or read book Distributed Computing written by Ajay D. Kshemkalyani and published by Cambridge University Press. This book was released on 2011-03-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designing distributed computing systems is a complex process requiring a solid understanding of the design problems and the theoretical and practical aspects of their solutions. This comprehensive textbook covers the fundamental principles and models underlying the theory, algorithms and systems aspects of distributed computing. Broad and detailed coverage of the theory is balanced with practical systems-related issues such as mutual exclusion, deadlock detection, authentication, and failure recovery. Algorithms are carefully selected, lucidly presented, and described without complex proofs. Simple explanations and illustrations are used to elucidate the algorithms. Important emerging topics such as peer-to-peer networks and network security are also considered. With vital algorithms, numerous illustrations, examples and homework problems, this textbook is suitable for advanced undergraduate and graduate students of electrical and computer engineering and computer science. Practitioners in data networking and sensor networks will also find this a valuable resource. Additional resources are available online at www.cambridge.org/9780521876346.
Download or read book Clock Synchronization with Deterministic Accuracy Guarantee written by Ryo Sugihara and published by . This book was released on 2011 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accuracy is one of the most important performance metrics in clock synchronization. While state-of-the-art synchronization protocols achieve 1.25 sec-order average accuracy, they usually do not focus on the worst case accuracy and do not have any deterministic guarantees. This lack of accuracy guarantee makes it hard for sensor networks to be incorporated into larger systems that require more reliability than e.g., typical environmental monitoring applications do. In this paper, we present a clock synchronization algorithm with deterministic accuracy guarantee. A key observation is that the variability of oscillation frequency is much smaller in a single crystal than between different crystals. Our algorithm leverages this to achieve much tighter accuracy guarantee compared to the interval-based synchronization methods mostly proposed in the literature of distributed systems. We designed an algorithm to solve a geometric problem involving tangents to convex polygons, and implemented that in TinyOS. Experimental results show the deterministic error bound less than 9.2 clock ticks (280 1.25 sec) on average at the first hop, which is close to the simulation results. Further, by a combination with previously proposed synchronization algorithms, it achieves the estimation error of 1.54 ticks at 10 hop distance, which is more than 40% better than FTSP, while giving deterministic error bounds.
Download or read book Clock Synchronization in Distributed Operating Systems written by M. Shahzad Adil Khan and published by . This book was released on 1991 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Analysis of Clock Synchronization Protocols for Fault tolerant Distributed Systems written by Raghukul Tilak and published by . This book was released on 2001 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
